NO Security Warning pop up to authorize renewed certificate

I get the following website when attempting to renew my certificate:

[i][b]Collection of Secure Email Certificate

Attempting to collect and install your Free Certificate…

You need to authorize the “Microsoft Certificate Enrollment Control” to install your new Certificate:
Click here to reload this webpage, then…
When you see a Security Warning popup, click Yes to install the “Microsoft Certificate Enrollment Control”.[/b][/i]

When I click on “here”, it just brings me back to the same page again. There is no security warning pop up. I have disabled pop-ups in IE8, disabled all anti-virus programs, put IE8 security and privacy to the lowest settings, added secure.comodo.com to my trusted sites, but still the same problem. I have IE8, Vista Home Premium 64 bit, Avira Anti-virus, MS Office 2007.

Thanks for help.

Hi,

Please submit the ticket in the following link, so that we can able to serve you better
http://support.comodo.com/index.php?_m=tickets&_a=submit